A plane electromagnetic wave of wave intensit | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(D) The intensity of the wave is $I = 6 \ W/m^2$ and the area of the mirror is $A = 40 \ cm^2 = 40 	imes 10^{-4} \ m^2$.For a perfectly reflecting su

Vedclass · Accepted Answer

$1.6 	imes 10^{-10} \ kg \cdot m/s$

Vedclass · Answer

(D) The intensity of the wave is $I = 6 \ W/m^2$ and the area of the mirror is $A = 40 \ cm^2 = 40 	imes 10^{-4} \ m^2$.For a perfectly reflecting surface (mirror) held perpendicular to the wave,the radiation pressure exerts a force,and the momentum transferred per second is equal to the force exerted.The momentum transferred per second is given by $p = \frac{2U}{c}$,where $U$ is the energy incident per second $(U = I 	imes A)$ and $c$ is the speed of light $(3 	imes 10^8 \ m/s)$.Substituting the values:$p = \frac{2 	imes I 	imes A}{c} = \frac{2 	imes 6 	imes 40 	imes 10^{-4}}{3 	imes 10^8}$$p = \frac{480 	imes 10^{-4}}{3 	imes 10^8} = 160 	imes 10^{-12} = 1.6 	imes 10^{-10} \ kg \cdot m/s$.

$A$ plane electromagnetic wave of wave intensity $6 \ W/m^2$ strikes a small mirror of area $40 \ cm^2$,held perpendicular to the approaching wave. The momentum transferred by the wave to the mirror each second will be:

Similar Questions

$A$ plane electromagnetic wave is incident on a material surface. If the wave delivers momentum $p$ and energy $E$,then

If $c$ is the speed of electromagnetic waves in vacuum,its speed in a medium of dielectric constant $K$ and relative permeability $\mu_r$ is

Dimension of $\frac{1}{\mu_0 \varepsilon_0}$ should be equal to

The electric field and magnetic field components of an electromagnetic wave going through vacuum are described by
$E_x = E_0 \sin(kz - \omega t)$
$B_y = B_0 \sin(kz - \omega t)$
Then the correct relation between $E_0$ and $B_0$ is given by

The velocity factor of a transmission line is $x$. If the dielectric constant of the medium is $2.6$,the value of $x$ is:

Vedclass Test Series

Exam Paper Generator

Online Exam Module